20525220451313 has 2 divisors, whose sum is σ = 20525220451314. Its totient is φ = 20525220451312.

The previous prime is 20525220451291. The next prime is 20525220451321. The reversal of 20525220451313 is 31315402252502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18187939031824 + 2337281419489 = 4264732^2 + 1528817^2 .

It is a cyclic number.

It is not a de Polignac number, because 20525220451313 - 2⁴⁰ = 19425708823537 is a prime.

It is not a weakly prime, because it can be changed into another prime (20525220451513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10262610225656 + 10262610225657.

It is an arithmetic number, because the mean of its divisors is an integer number (10262610225657).

Almost surely, 2^{20525220451313} is an apocalyptic number.

It is an amenable number.

20525220451313 is a deficient number, since it is larger than the sum of its proper divisors (1).

20525220451313 is an equidigital number, since it uses as much as digits as its factorization.

20525220451313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72000, while the sum is 35.

The spelling of 20525220451313 in words is "twenty trillion, five hundred twenty-five billion, two hundred twenty million, four hundred fifty-one thousand, three hundred thirteen".